Mathematics carries the highest weight in AISSEE — 150 of 300 marks in Class 6 and 200 of 400 marks in Class 9 — and it is also a key section of the RMS CET. Practise these 10 MCQs on Decimals, then check your answers and step-by-step solutions in the answer key at the end.
Quick facts: AISSEE 2027 will be held on Sunday, 31 January 2027. There is no negative marking, so attempt every question. Online applications are open until 2 December 2026 on exams.nta.nic.in/sainik-school-society.
Practice Questions
Q1. What is 18.27 + 5.2?
(A) 23.57
(B) 23.47
(C) 22.47
(D) 24.57
Q2. What is 1.2 × 0.4?
(A) 4.8
(B) 0.05
(C) 1.6
(D) 0.48
Q3. Write 2/5 as a decimal.
(A) 4
(B) 0.45
(C) 0.4
(D) 2.5
Q4. In the number 0.4782, which digit is in the hundredths place?
(A) 7
(B) 4
(C) 8
(D) 0
Q5. What is 8.55 + 8.7?
(A) 17.35
(B) 16.25
(C) 17.25
(D) 18.35
Q6. What is 0.3 × 12?
(A) 36
(B) 0.36
(C) 12.3
(D) 3.6
Q7. In the number 61.205, which digit is in the hundredths place?
(A) 0
(B) 5
(C) 1
(D) 2
Q8. What is 15.08 + 7?
(A) 22.18
(B) 22.08
(C) 21.08
(D) 23.18
Q9. What is 0.2 × 0.4?
(A) 0.8
(B) 0.01
(C) 0.08
(D) 0.6
Q10. Write 11/20 as a decimal.
(A) 5.5
(B) 0.55
(C) 0.6
(D) 11.20
Answer Key with Explanations
(B) 23.47 — Line up the decimal points and add: 23.47.
(D) 0.48 — Multiply as whole numbers and count decimal places: 0.48.
(C) 0.4 — 2 ÷ 5 = 0.4.
(A) 7 — The hundredths place is the 2nd digit after the decimal point: 7.
(C) 17.25 — Line up the decimal points and add: 17.25.
(D) 3.6 — Multiply as whole numbers and count decimal places: 3.6.
(A) 0 — The hundredths place is the 2nd digit after the decimal point: 0.
(B) 22.08 — Line up the decimal points and add: 22.08.
(C) 0.08 — Multiply as whole numbers and count decimal places: 0.08.
(B) 0.55 — 11 ÷ 20 = 0.55.
How did you score?
9–10 correct: excellent — move on to a full-length mock test. 6–8: good — revise the explanations of the questions you missed. Below 6: study this topic again from your NCERT book and retry these questions after two days.
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