Worksheet on Number Names and Number Sense (4-digit numbers)

Solved Questions on Number Sense

1. Which of the following represents 4528 in its expanded form?

a) 4000 + 200 + 50 + 8
b) 4000 + 500 + 20 + 8
c) 2000 + 400 + 50 + 8
d) 5000 + 200 + 40 + 8

Answer: b) 4000 + 500 + 20 + 8

Explanation: The expanded form of the number 4528 = 4000 + 500 + 20 + 8

2. How many even numbers are there between 1 to 100?

a) 20
b) 30
c) 40
d) 50

Answer: d) 50

Explanation: There are 50 even numbers between 1 to 100.

3. Which of the following is arranged in descending order?

a) 9875, 9842, 9829, 8917, 8921
b) 9875, 9842, 9829, 8921, 8971
c) 9875, 9842, 9829, 9817, 8921
d) 9875, 9842, 9829, 8917, 8981

Answer: c) 9875, 9842, 9829, 9817, 8921

Explanation: Numbers can be arranged as 9875, 9842, 9829, 9817 and 8921 in descending order.

4. If the price of 10 kilograms of gold-plated jewellery is $3500, what is the price of 7 kilograms of gold-plated jewellery?

a) $2400
b) $2450
c) $2500
d) $2550

Answer: b) $2450

Explanation: Price of 10 kg gold plated jewellery = $3500
Price of 1 kg gold plated jewellery = 3500 10 = $350
Price of 7 kg gold plated jewellery = 350 × 7 = $2450

5. How is 29 represented in the Roman language?

a) XXIX
b) XXV
c) XXIV
d) XXX

Answer: a) XXIX

Explanation: The Roman numbers for numerals are shown:
20 = XX
9 = IX

Hence, 29 = 20 + 9
= XX + IX
29 can be represented as XXIX in the Roman language.