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An auditorium had 240 rows of chairs. If there are 170 chairs in each row, how many persons can be seated in the auditorium?
No. of chairs in each row = 240 No. of rows of chairs = 170
∴Total no. of chairs =240 × 170=40800
∴ 40800 persons can be seated in the auditorium.
Identify the missing number.
163 × 38 = (160 + 3) × [ ]
163 = 160 + 3 and 38 = 35 + 3 So, 163 × 38=(160 + 3) × (35 + 3)
∴ The missing number is (35 + 3).
Find the product obtained when the difference between 12030 and 8107 is multiplied by 37.
The difference between 12030 and 8107 multiplied by 37 is written as (12030 − 8107) × 37 = 3923 × 37= (3900 + 23) × (40 − 3)
Identify the product of 684 and 43 rounded off to the nearest 100.
The total weight of 4 dictionaries and 1079 exercise books is 75 kg. If each exercise book weighs 68 g, what is the weight of each dictionary?
total weight = 75 kg = 75000g
since, 1 kg = 1000g
weight of 1 excercise book = 68g
weight of 1079 excercise book = 68 * 1079 = 73372g
so, weight of 4 dictionary = 75000 73372 = 1628g
therefore, weight of 4 dictionary = 1628/ 4 = 407g
hence the weight of 1 dictionary is 407 grams
The cost of a bicycle is Rs. 797. What is the cost of 8 bicycles?
What is the number in [ ] if 8 × 6 = 2 × [ ] × 8?
8 × 6 = 2 × 3 × 8 (Since, 6 = 2 × 3)
Sumanth saves Rs. 250 every month. How much money will he be saving in one year?
Rs.250 × 12 = Rs. 3000
Which digit should be placed in [ ], so that the following multiplication is correct?
Since 3 × 7 = 21, and 523 × 7 = 3661, the missing digit is 3.
A school club has 525 members. If each member pays Rs. 11 as the membership fee, how much money is collected?
Money collected = Rs. 11 × 525 = Rs. 5775
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