It is: 42+10 = 52
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The number is 18 because 2*(18)+6 = 42
2 and 7 are prime numbers less than 10 that are factors of 42 and 70.
42<n<95. Also, since it is over 42, then that would be every number over forty-two. However, seeing as it must be less than ninety-five, it is every number that is over 42 but less than 95.
6*7 is 42 42+5=49
The square of a number is the number multiplied by itself. Therefore the square of the number 4 written normally as 42 is = 4*4 = 16. Five more than 42 would therefore be =(4*4)+5 = 21.