Question

210,209,213,186,202,?​

Answer 1

Answer:

77

Step-by-step explanation:

210-1^3=209

209+2^2=213

213-3^3=186

186+4^2=202

242-5^3=77

Answer 2

Answer:

The missing term is 77.

To find:

210,209,213,186,202,?

Solution:  

Since the numbers are increasing and decreasing, it cannot follow AP and GP.

Alternate addition and subtraction is carried out in the series in alternative places.

                                          210 – $1^3$ = 209

                                          209 + x = 213

                                          x = 4 = $2^2$

                                          209 + $2^2$ = 213

                                          213 – x = 186  

                                          x = 9 = $3^3$

                                          213 – $3^3$= 186

                                          186 + x = 202

                                          x = 16 = $4^2$

                                          186 + $4^2$= 202

                                          202 – $5^3$ = 77