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  1. >>Class 6
  2. >>Maths
  3. >>Knowing Our Numbers
  4. >>Hard Questions

Knowing Our Numbers

Maths
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Easy QsMed QsHard Qs
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The traffic lights at three different road

crossings change after every 48 sec, 72 sec and 108 sec, respectively. If they

all change simultaneously at 8:20:00 hrs., then at what time will they again

change simultaneously?




A
8:26:12 hrs.
B
8:26:00 hrs.
C
8:27:00 hrs.
D
8:27:12 hrs.
Hard
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Write the greatest 4−digit number using different digits with 6 in the ten's place?

A
9865
B
9867
C
9687
D
6987
Hard
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Expanded form of 37034 is __________.

A
3000+700+0+30+4
B
30000+700+0+10+4
C
30000+1000+0+70+4
D
30000+7000+0+30+4
Hard
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Find the greatest number which will divide the greatest 4−digit number and the greatest 5−digit number exactly.

A
9
B
8
C
7
D
3
Hard
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The Patel family flies from their home town, H, to Kiruna , K , in Lapland.
Mr. Patel buys a bag of sweets.
The bag of sweets costs $3.25.
Calculate the cost of the sweets in euros (∈)  when the exchange rate is ∈1=$1.24.

Hard
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Add the following rational number 
7−3​ and 7−5​

Hard
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One trillion is 1 followed by 12 zeros. What is 1 followed by 18 zeros?

A
1 quadrillion
B
1 quintillion
C
1 septillion
D
1 octillion
Hard
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