MEDIUM
7th CBSE
IMPORTANT
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The HCF and the LCM of two numbers are 24 and 1008. If one of the numbers is 168, then find the other number.

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Important Questions on Number Systems

MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 53
Find the greatest number that can divide 246 and 279 by leaving remainders 2 and 3, respectively.
HARD
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 54
Find the greatest possible quantity which can be used to measure exactly the quantities 3 L 250 mL, 3 L 500 mL and 4 L.
HARD
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 55
What is the least positive integer by which 4500 should be divided so that the quotient is a perfect cube?
MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 56
A total of 1152 students were assembled in rows and columns. If there are n rows and n2 columns, then find the number of students in each row.
MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 57
The LCM of two numbers is 26, then which of the following can be their HCF?
MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 58
In a computer game, if we hit a balloon, we get 500 points, and if we miss the balloon, we lose 300 points. Raj hits 20 balloons and misses 40 balloons. Find his net score.
MEDIUM
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 59
Krishna purchased 20 pencils for his two sons Akhil and Nikhil. Akhil took two-fifth of the total number of these pencils and Nikhil took the remaining pencils. Find the number of pencils taken by Nikhil.
HARD
7th CBSE
IMPORTANT
Pearson IIT Foundation Mathematics>Chapter 1 - Number Systems>PRACTICE QUESTIONS (COMPETITION WING)>Q 60
If x=(-23)+22+(-23)+22 .... (40 terms) and y=11+(-10)+11+(-10)+ ..... (40 terms), then y-x is _____.