1.
The population of a country was 5,10,37,200 in the year 2000.In
the year 2010 the population became 5,74,69,450. What was the
increase in population?
2.
Students from 128 schools took part in a speed-math
competition. Each school sent 62 students. If each students
answered 35 questions, how many answers were to be checked?
3.
Find the greatest number that will divide 54 and 81 without
leaving a remainder.
4.
Find the smallest number which when divided by 14 and 21
leaves no remainder.
5.
A biscuit pocket of length = 14.4cm, breadth= 10cm and height=
6cm contains 36 biscuits. If the biscuits are packed with no space
between them, what is the volume of each biscuit?
Answers
Answer of que 1
population of a country was 5,10,37,200 in the year 2000
in the year 2010, the population became 5,74,69,450
increase in population
= 5,74,69,450 - 5,10,37,200
=64,32,250
Answer of que 2
Total number - 128
each school sent students= 62
total no.of students who took part = 128×62 = 7936 students.
each student answered no. of questions = 35
Total student = 7936
no. of Answers to be checked = each student answered no. of ques × Total students = 35× 7936= 27760
Answer of que 3
we will solve this by finding the HCF of the numbers.
Factors of 54 = 2×3×3×3
Factors of 81 = 3×3×3×3
HCF of 54 and 81 = 27
answer of que 4
Take L.C.M
14= 2×7
21 = 3×7
LCM of 14 and 21
= 2×3×7 = 42
verification
42÷14= 3
42÷ 21= 2
answer of Que 5
volume of biscuit packet = L×b×h
=14.4 cm ×10 cm × 6cm
= 864 cm³
number of biscuits in a packet = 36
volume of biscuit packet= volume of 36 biscuits= 864cm³
therefore volume of one biscuit = 864/36 = 24cm³