Hundreds	Tens	Units
1	3	4

Place value of 3 is 3 tens.

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.

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

Thousands	Hundreds	Tens	Units
8	3	4	3

Place value of 8 is 8 thousands.

84121 has 4 at thousands place.

Place value of 3 is 3 ten thousands.

Thousands	Hundreds	Tens	Units
8	2	0	1

8 is at thousands place.

4 is at hundred thousands place in 689431489.

 In 6495784, we have 6 at the millions place. So, there are 6 millions in the given number.

1 million = 1000000 100 million = 100 × 1000000 = 100000000 There are eight zeros in 100 million.

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

20, ___, 12, 8, 4 12 - 4 = 8 8 - 4 = 4 Subtract 4 from each term to get the next term. So, the missing term will be 20 - 4 = 16.

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5 is at hundred thousands place.

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

50, 45, 40, __ 50 - 5 = 45 45 - 5 = 40 Subtract 5 from each term to get the next term. So, the  next term will be 40 - 5 = 35.

14, 18, ___, 26, 30 So, 14 + 4 = 18 18 + 4 = 22 22 + 4 = 26                    26 + 4 = 30 Add 4 to each term to get the next term. So, the missing term will be 18 + 4 = 22.

54, 51, 48, 45, 42, ____ Subtract 3 from each term to get the next term. 54 - 51 = 3 51 - 48 = 3 So, the required pattern is 'subtract 3'.

9, 11, 13, ... 9 + 2 = 11 11 + 2 = 13 Add 2 to each term to get the next term. So, the  next term will be 13 + 2 = 15.

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