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Class 6 Number Line Operations — practice questions with answers

Whole Numbers · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.

1. On a number line, you start at 18 and move 25 steps to the right. Where do you reach?
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Answer: A) 43
Moving right means adding: 18 + 25 = 43.
2. Meera starts at 0 and makes equal jumps of 4. After 5 jumps to the right, where does she land?
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Answer: A) 20
5 jumps of 4 from 0: 5 x 4 = 20.
3. Ravi marks a number line in steps of 1 from 0 to 30.
He paints every point that he lands on when jumping by 5 from 0.
He also paints every point he lands on when jumping by 6 from 0.
Which painted point (other than 0) is the first one painted twice?
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Answer: B) 30
Jumps of 5 land on 5,10,15,20,25,30; jumps of 6 land on 6,12,18,24,30. The first common point after 0 is 30 (LCM of 5 and 6).
4. A flea starts at 0 and jumps right in equal steps.
After some jumps it is exactly at 48, and the same flea reaches 48 whether it uses jumps of size 8 or jumps of size 12.
How many MORE jumps does it make with size 8 than with size 12?
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Answer: B) 2
48 ÷ 8 = 6 jumps; 48 ÷ 12 = 4 jumps; 6 - 4 = 2 more jumps.
5. On a number line, a token starts at 0.
It repeats the move pattern +7, +7, -5 (three moves per round).
After completing exactly 8 full rounds, what number is the token on?
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Answer: D) 72
Each round changes position by 7 + 7 - 5 = 9. After 8 rounds: 8 x 9 = 72.
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