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Four numbers share something. Work out what, then find the one that does not.
Question 1 of 12
Four of these numbers belong together. Which is the odd one out? 23 81 49 25 16
Look for something four of them share. Here it is that they are all square numbers: 16, 25, 49, 81. 23 is not, so it is the odd one out. Check your rule against all four before deciding which one breaks it.
The answer is A. Look for something four of them share. Here it is that they are all square numbers: 16, 25, 49, 81. 23 is not, so it is the odd one out. Check your rule against all four before deciding which one breaks it.
Four of these numbers belong together. Which is the odd one out? 88 48 22 12 40
Look for something four of them share. Here it is that they are all multiples of 4: 12, 40, 48, 88. 22 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
The answer is C. Look for something four of them share. Here it is that they are all multiples of 4: 12, 40, 48, 88. 22 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
Four of these numbers belong together. Which is the odd one out? 81 18 16 64 49
Look for something four of them share. Here it is that they are all square numbers: 16, 49, 64, 81. 18 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
The answer is B. Look for something four of them share. Here it is that they are all square numbers: 16, 49, 64, 81. 18 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
Four of these numbers belong together. Which is the odd one out? 64 36 25 93 49
Look for something four of them share. Here it is that they are all square numbers: 25, 36, 49, 64. 93 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
The answer is D. Look for something four of them share. Here it is that they are all square numbers: 25, 36, 49, 64. 93 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
Four of these numbers belong together. Which is the odd one out? 81 54 45 98 72
Look for something four of them share. Here it is that they are all multiples of 9: 45, 54, 72, 81. 98 is not, so it is the odd one out. If the times tables do not work, look for square numbers, or for odd and even.
The answer is D. Look for something four of them share. Here it is that they are all multiples of 9: 45, 54, 72, 81. 98 is not, so it is the odd one out. If the times tables do not work, look for square numbers, or for odd and even.
Four of these numbers belong together. Which is the odd one out? 16 64 49 35 81
Look for something four of them share. Here it is that they are all square numbers: 16, 49, 64, 81. 35 is not, so it is the odd one out. Try the times tables first: four numbers sharing a multiple is the most common version of this.
The answer is D. Look for something four of them share. Here it is that they are all square numbers: 16, 49, 64, 81. 35 is not, so it is the odd one out. Try the times tables first: four numbers sharing a multiple is the most common version of this.
Four of these numbers belong together. Which is the odd one out? 68 24 52 28 70
Look for something four of them share. Here it is that they are all multiples of 4: 24, 28, 52, 68. 70 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
The answer is E. Look for something four of them share. Here it is that they are all multiples of 4: 24, 28, 52, 68. 70 is not, so it is the odd one out. Put the four in order in your head — the pattern is often easier to see that way.
Four of these numbers belong together. Which is the odd one out? 92 16 45 48 56
Look for something four of them share. Here it is that they are all multiples of 4: 16, 48, 56, 92. 45 is not, so it is the odd one out. Try the times tables first: four numbers sharing a multiple is the most common version of this.
The answer is C. Look for something four of them share. Here it is that they are all multiples of 4: 16, 48, 56, 92. 45 is not, so it is the odd one out. Try the times tables first: four numbers sharing a multiple is the most common version of this.
Four of these numbers belong together. Which is the odd one out? 25 16 49 85 81
Look for something four of them share. Here it is that they are all square numbers: 16, 25, 49, 81. 85 is not, so it is the odd one out. If the times tables do not work, look for square numbers, or for odd and even.
The answer is D. Look for something four of them share. Here it is that they are all square numbers: 16, 25, 49, 81. 85 is not, so it is the odd one out. If the times tables do not work, look for square numbers, or for odd and even.
Four of these numbers belong together. Which is the odd one out? 77 49 64 16 81
Look for something four of them share. Here it is that they are all square numbers: 16, 49, 64, 81. 77 is not, so it is the odd one out. Check your rule against all four before deciding which one breaks it.
The answer is A. Look for something four of them share. Here it is that they are all square numbers: 16, 49, 64, 81. 77 is not, so it is the odd one out. Check your rule against all four before deciding which one breaks it.
Four of these numbers belong together. Which is the odd one out? 64 66 36 25 81
Look for something four of them share. Here it is that they are all square numbers: 25, 36, 64, 81. 66 is not, so it is the odd one out. Check your rule against all four before deciding which one breaks it.
The answer is B. Look for something four of them share. Here it is that they are all square numbers: 25, 36, 64, 81. 66 is not, so it is the odd one out. Check your rule against all four before deciding which one breaks it.
Four of these numbers belong together. Which is the odd one out? 16 8 52 76 45
Look for something four of them share. Here it is that they are all multiples of 4: 8, 16, 52, 76. 45 is not, so it is the odd one out. Try the times tables first: four numbers sharing a multiple is the most common version of this.
The answer is E. Look for something four of them share. Here it is that they are all multiples of 4: 8, 16, 52, 76. 45 is not, so it is the odd one out. Try the times tables first: four numbers sharing a multiple is the most common version of this.
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