Counting | MCQs

Explanation

1 Million is equal to 10,00,000 (10 Lac)
1 billion is equal to 1000 million

1 billion has 9 zeroes

1 billion means ایک ارب 

Explanation

The smallest natural number is 1.

As natural numbers begin from 1 and go onwards (1, 2, 3, ...).

0 is not considered a natural number in standard mathematics.

Explanation

Whole numbers are non-negative integers: 0, 1, 2, 3…

0 is a whole number.

Explanation

√15129 = 123, which has 3 digits.

So, the number of digits in the square root of 15129 is 3.

Explanation

Step 1: Counting 7s in the ones place

Numbers where 7 appears in the ones place:

7, 17, 27, 37, 47, 57, 67, 77, 87, 97 → 10 times

Step 2: Counting 7s in the tens place

Numbers where 7 appears in the tens place:

70, 71, 72, 73, 74, 75, 76, 77, 78, 79 → 10 times

Step 3: Adjust for double counting

77 has two sevens, so we counted it twice.

Total occurrences:

10 (ones place) + 10 (tens place) = 20 times

Explanation

Total heads = 200

Total legs = 580

Calculation:

Let, number of pigeons be x and number of rabbits be y

According to the question,

x + y = 200     ...i)

2x + 4y = 580

⇒ x + 2y = 290     ...ii)

From (i) and (ii) we get,

y = 90

⇒ x = 200 – 90 = 110

∴ There are 110 pigeons in the zoo

Explanation

The husband and wife: 2

Six married sons: 6

Six daughters-in-law (wives of the sons): 6

30 grandchildren (6 sons x 5 children each): 30

Total family members: 2 + 6 + 6 + 30 = 44

The correct answer is 44.

Explanation

Let's say the number of girls is G and the number of boys is B.

3/4G = 1/2B

Given that the total number of pupils is 1420:

G + B = 1420

Solving the equations, we get B = 852.

The correct answer is 852.

Explanation

1 gross = 12 dozen  

1 dozen = 12 articles  

So, 12 × 12 = 144 articles in 1 gross.

Explanation

The even numbers between 1 and 25 are 12

Such as: 2,4,6,8,10,12,14,16,18,20,22, and 24.