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Class 6
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Maths
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Knowing Our Numbers
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Hard Questions
Knowing Our Numbers
Maths
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Easy Qs
Med Qs
Hard Qs
>
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
−
d
i
g
i
t
number using different digits with
6
in the ten's place?
A
9
8
6
5
B
9
8
6
7
C
9
6
8
7
D
6
9
8
7
Hard
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>
Expanded form of
3
7
0
3
4
is __________.
A
3
0
0
0
+
7
0
0
+
0
+
3
0
+
4
B
3
0
0
0
0
+
7
0
0
+
0
+
1
0
+
4
C
3
0
0
0
0
+
1
0
0
0
+
0
+
7
0
+
4
D
3
0
0
0
0
+
7
0
0
0
+
0
+
3
0
+
4
Hard
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>
Find the greatest number which will divide the greatest
4
−
d
i
g
i
t
number and the greatest
5
−
d
i
g
i
t
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
.
2
5
.
Calculate the cost of the sweets in euros
(
∈
)
when the exchange rate is
∈
1
=
$
1
.
2
4
.
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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>
