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Two complete sets show the rule. Use it to fill in the brackets in the third.
Question 1 of 12
(12 [132] 11) (9 [54] 6) (8 [?] 10) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 12 and 11 give 132; in the second, 9 and 6 give 54. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 8 and 10 gives 80. Write the rule down in words before you work out the answer.
The answer is A. Use the two complete sets to find the rule, then check it before you use it. In the first, 12 and 11 give 132; in the second, 9 and 6 give 54. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 8 and 10 gives 80. Write the rule down in words before you work out the answer.
(6 [18] 12) (10 [18] 8) (6 [?] 4) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 6 and 12 give 18; in the second, 10 and 8 give 18. In both, the number in the brackets is the two outside numbers added together. Doing the same to 6 and 4 gives 10. Always test your rule on the second set before using it on the third.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 6 and 12 give 18; in the second, 10 and 8 give 18. In both, the number in the brackets is the two outside numbers added together. Doing the same to 6 and 4 gives 10. Always test your rule on the second set before using it on the third.
(5 [10] 5) (11 [17] 6) (5 [?] 4) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 5 and 5 give 10; in the second, 11 and 6 give 17. In both, the number in the brackets is the two outside numbers added together. Doing the same to 5 and 4 gives 9. Write the rule down in words before you work out the answer.
The answer is A. Use the two complete sets to find the rule, then check it before you use it. In the first, 5 and 5 give 10; in the second, 11 and 6 give 17. In both, the number in the brackets is the two outside numbers added together. Doing the same to 5 and 4 gives 9. Write the rule down in words before you work out the answer.
(7 [22] 4) (7 [18] 2) (10 [?] 2) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 7 and 4 give 22; in the second, 7 and 2 give 18. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 10 and 2 gives 24. Always test your rule on the second set before using it on the third.
The answer is B. Use the two complete sets to find the rule, then check it before you use it. In the first, 7 and 4 give 22; in the second, 7 and 2 give 18. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 10 and 2 gives 24. Always test your rule on the second set before using it on the third.
(6 [22] 5) (9 [26] 4) (9 [?] 10) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 6 and 5 give 22; in the second, 9 and 4 give 26. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 9 and 10 gives 38. If adding does not work, try multiplying, then try taking one from the other.
The answer is B. Use the two complete sets to find the rule, then check it before you use it. In the first, 6 and 5 give 22; in the second, 9 and 4 give 26. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 9 and 10 gives 38. If adding does not work, try multiplying, then try taking one from the other.
(3 [15] 5) (6 [18] 3) (7 [?] 11) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 3 and 5 give 15; in the second, 6 and 3 give 18. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 11 gives 77. Always test your rule on the second set before using it on the third.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 3 and 5 give 15; in the second, 6 and 3 give 18. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 11 gives 77. Always test your rule on the second set before using it on the third.
(4 [16] 12) (4 [14] 10) (2 [?] 6) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 4 and 12 give 16; in the second, 4 and 10 give 14. In both, the number in the brackets is the two outside numbers added together. Doing the same to 2 and 6 gives 8. Always test your rule on the second set before using it on the third.
The answer is A. Use the two complete sets to find the rule, then check it before you use it. In the first, 4 and 12 give 16; in the second, 4 and 10 give 14. In both, the number in the brackets is the two outside numbers added together. Doing the same to 2 and 6 gives 8. Always test your rule on the second set before using it on the third.
(6 [5] 1) (10 [5] 5) (7 [?] 3) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 6 and 1 give 5; in the second, 10 and 5 give 5. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 7 and 3 gives 4. Write the rule down in words before you work out the answer.
The answer is E. Use the two complete sets to find the rule, then check it before you use it. In the first, 6 and 1 give 5; in the second, 10 and 5 give 5. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 7 and 3 gives 4. Write the rule down in words before you work out the answer.
(3 [18] 6) (2 [22] 9) (5 [?] 12) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 3 and 6 give 18; in the second, 2 and 9 give 22. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 5 and 12 gives 34. If adding does not work, try multiplying, then try taking one from the other.
The answer is D. Use the two complete sets to find the rule, then check it before you use it. In the first, 3 and 6 give 18; in the second, 2 and 9 give 22. In both, the number in the brackets is the two outside numbers added together and then doubled. Doing the same to 5 and 12 gives 34. If adding does not work, try multiplying, then try taking one from the other.
(9 [45] 5) (6 [48] 8) (6 [?] 3) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 9 and 5 give 45; in the second, 6 and 8 give 48. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 6 and 3 gives 18. Write the rule down in words before you work out the answer.
The answer is D. Use the two complete sets to find the rule, then check it before you use it. In the first, 9 and 5 give 45; in the second, 6 and 8 give 48. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 6 and 3 gives 18. Write the rule down in words before you work out the answer.
(10 [70] 7) (2 [22] 11) (7 [?] 12) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 10 and 7 give 70; in the second, 2 and 11 give 22. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 12 gives 84. Always test your rule on the second set before using it on the third.
The answer is B. Use the two complete sets to find the rule, then check it before you use it. In the first, 10 and 7 give 70; in the second, 2 and 11 give 22. In both, the number in the brackets is the two outside numbers multiplied together. Doing the same to 7 and 12 gives 84. Always test your rule on the second set before using it on the third.
(10 [5] 5) (11 [9] 2) (5 [?] 1) What number belongs in the brackets?
Use the two complete sets to find the rule, then check it before you use it. In the first, 10 and 5 give 5; in the second, 11 and 2 give 9. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 5 and 1 gives 4. If adding does not work, try multiplying, then try taking one from the other.
The answer is C. Use the two complete sets to find the rule, then check it before you use it. In the first, 10 and 5 give 5; in the second, 11 and 2 give 9. In both, the number in the brackets is the two outside numbers the right number taken from the left one. Doing the same to 5 and 1 gives 4. If adding does not work, try multiplying, then try taking one from the other.
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