Question

question=15,21,57,?,222​

Answer 1

ANSWER: I THINK THERE IS A SLIGHT MISTAKE IN THE QUESTION.........

This series is like 1, 5, 21, 57, ____,221.

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 5

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 55+16 = 21

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 55+16 = 2121+36 = 57

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 55+16 = 2121+36 = 5757+64 = 121

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 55+16 = 2121+36 = 5757+64 = 121121+100 = 221

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 55+16 = 2121+36 = 5757+64 = 121121+100 = 221So next difference will be square of 8=64 so 57+64=121. is the missing number in the series. 1, 5, 21, 57, 121, 221.

This series is like 1, 5, 21, 57, ____,221.There is a difference of 4, 16, 36 which are squares of 2, 4, 6 respectively.1+4 = 55+16 = 2121+36 = 5757+64 = 121121+100 = 221So next difference will be square of 8=64 so 57+64=121. is the missing number in the series. 1, 5, 21, 57, 121, 221.So, the answer will be 121.

I HOPE THIS HELPED YOU.

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