# Class 6 Maths Periodical Test September 2021

## Class 6 Maths Periodical Test September 2021

M619 Works with numbers up to 8-digits.

Q -1 Do as directed.

Which number will be formed, by we interchanging the digits at unit’s and hundreds place in 123? Is the new number greater or smaller than 123? (2)

Solution:-

By interchanging unit and hundred place we get the number 321 ,which is greater than 123

(2) Which number we will get if we subtract the place value of 4 from the place value of 5 in 95432? (2)

Solution:-

In 95432 the place value of 5 is 5000 and place value of 4 is 400.

If we substract 5000-400 we get the answer is 4600

(3) Write in words: 5,02,324 (1)

Solution

Five lakh two thousand three hundred twenty four.

M620.3 Knows the properties of addition and multiplication for whole numbers and uses them in the calculation. Q -2 Do as directed.

Find the product using rearrangement. 4 ×1853 ×25 (2)

Solution:

• 4 x 1853 x 25
• 1853 x [25 x4 ]
• 1853 x 100
• 185300

(2) Rameshbhai filled his truck diesel tank with 60 litres of diesel on Monday and 40 litres of diesel on Tuesday. If the diesel costs ₹ 85 per litre, how much did he spend in all on diesel?

Solution:

• On Monday he filled 60 ltrs.
• On Tuesday he filled 40 ltrs.
• Total diesel filled = 100 ltrs.
• Diesel cost per litre = 85 rs.
• Total amount spent = 100*85 = 8500

M602.4 Finds common factors and common multiples of given number.

Q -3 Do as directed.

Which two numbers have 7 as a common factor? (1)

Solution:-   14 , 21

(2) Write common factors of 20 and 25. (2)

Solution :

• Factor of 20 are – 1,2,4,5,10,20
• Factor of 25 are – 1,5,25
• Common factors are 1 and 5

(3) Write first three common multiples of 3 and 5. (2)

Solution:

• Multiples of 3 are – 3,6,9,12,15,18,21,24,27,30,33,36,39,42,45
• Multiples of 5 are – 5,10,15,20,25,30,35,40,45,50,55,60,65,70,75
• Common multiples are – 15 , 30 and 45

M603.2 Finds L.C.M and solves practical problems related to it.

Q – 4 Do as directed.

Find L.C.M of 40 and 60. (2) LCM of 40 and 60 is 120

Which smallest 3-digit number is divisible by 12, 18 and 24? (3)

12 – 12 , 24 ,36 , 48 ,60,72,84,96,108,120,132,144,156

18 – 18 ,36 ,54 ,72 ,90 ,108 ,126 ,144 ,162 ,180

24 – 24 ,48 ,72 ,96 ,120 ,144 ,168

Smallest 3 Digit number is 144 1 – D Triangle

2 – B – A 