Find a number in the sequence

1) 100, 400, 610,?, 652

2) 342, 128,?, 26

1. 460

2. 216

Step-by-step explanation:

1.

From the series,

100, 400, 610,?, 652

Writing the the digits in the revere order, i. e

001, 004, 016,?, 256

Now,

Now, getting the number in the form of the multiple of 4 as -

1, 1 * 4 = 4, 4 * 4 = 16,?, 64 * 4 = 4

Hence, the value for? = 16 * 4 = 64.

Again, reversing 64 to get the missing number of the series -

460.

Hence,

The value for? is 460.

2.

From the series,

342, 128,?, 26

Now, multiplying the first digit with the second digit and merging it to the product of the second and third digit -

3 * 4 and 4 * 2, 1 * 2 and 2 * 8,?

128, 216,?

Hence,

The value for question mark = 1 * 2 and 1 * 6 = 216

Hence,

The value for? is 216.