Question

97,98,90,117,?,178 which number in this place

Answer 1

We have to complete the given sequence 97,98,90,117, ? , 178

Let us start from the first term

Let us add $1^3$ to the first term '97', we get second term as

$97 + 1^3 = 98$.

Second term = 98

Let us subtract $2^3$ from the second term, we get third term as

$98-2^3 = 98-8 = 90$.

Third term = 90

Let us add $3^3$ to the third term, we get fourth term as

$90+3^3 = 90+27 = 117$.

Fourth term = 117

Let us subtract $4^3$ from the fourth term, we get fifth term as

$117-4^3 = 117-64 = 53$.

Fifth term = 53

Let us add $5^3$ to the fifth term, we get sixth term as

$53+5^3 = 53+125 = 178$.

Sixth term = 178

Therefore, the missing number is 53.