Place value of 3 in 837826 is ten thousands.

Thousands	Hundreds	Tens	Units
8	0	0	1

8 is at thousands place.

Thousands	Hundreds	Tens	Units
8	3	4	3

Place value of 8 is thousands.

84121 has 4 at thousands place.

In 6495784, there are six digits after 6. Therefore, there are 6 millions as one million has 6 zeros.

Digit at millions place in 16245789 = 6 Digit at millions place in 31390742 = 1 Now, 6 + 1 = 7

Hundreds	Tens	Units
1	3	4

Place value of 3 is tens.

1 million = 1000000 100 million = 100 × 1000000 = 100000000 Eight zeros are there in 100 million.

1 billion = 1000000000 There are 9 zeros in 1 billion.

93795 ||||||| |---|---|---|---|---|---| |

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4 is at hundred thousands place.

1 million = 1000000 There are 6 zeros in 1 million.

Ten thousands	Thousands	Hundreds	Tens	Units
2	3	4	1	8

1 is at tens place.

Digit at ten thousands place in 345678 is 4. Digit at ten thousands place in 79813456 is 1. So, 4 + 1 = 5

52747 ||||||| |---|---|---|---|---|---| |

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5 is at hundred thousands place.

9, 11, 13, __ 2 is added to each term to get the next term. 9 + 2 = 11 11 + 2 = 13 13 + 2 = 15

14, 18, ___, 26, 30 Pattern: 4 is added to each term to get the next term. So, 14 + 4 = 18 18 + 4 = 22 22 + 4 = 26                    26 + 4 = 30

20, ___, 12, 8, 4 4 is subtracted from each term to get the next term. 20 - 4 = 16        16 - 4 = 12 12 - 4 = 8 8 - 4 = 4

54, 51, 48, 45, 42, ____ 3 is subtracted from each term to get the next term. 54 - 51 = 3 51 - 48 = 3 Therefore, difference = 3

50, 45, 40, __ 5 is subtracted from each term to get the next term. 50 - 5 = 45 45 - 5 = 40 40 - 5 = 35