Page 23 - CT&AI_CLasa_7_Part_1

• I am a 4-digit number.
• I am less than 100.
• I have only one odd digit.
• The hundredths digit is the sum of the tens and ones digits.
• The tens digit is three times the ones digit.
• The tens digit is two times the tenths digit.
What number am I?

(a) 62.58 (b) 42.36

(c) 52.46 (d) 62.38

cbse handbook questions

Tick ( ) the correct option.
1. Two decimal numbers differ by 3.6. In one (a) Sensor A
of the numbers, the decimal point is moved
one place to the right. After this change, (b) Sensor B
both numbers become equal. Which was the
smaller of the two original numbers before (c) Sensor C
shifting the decimal point?
(d) Cannot be determined
(a) 0.4
3. Alex has to fill in the blank with a DECIMAL
(b) 0.36 NUMBER formed using every digit among 0, 1,
2, 3, and 4, each exactly once, where:
(c) 3.6
• The sum of the digits before the decimal
point is equal to the sum of the digits after
(d) 4
the decimal point
2. There are three sensors - A, B, and C. Each • The digits before the decimal point are in
sensor displays the measurement of the descending order and the digits after the
length of the same item, but in different units: decimal point are in ascending order
metres, centimetres, or kilometres. Only one • The conditions of "<" are satisfied
sensor shows the correct length. The other How many different numbers can be placed in
two show values that are 10 times greater the blank?
and 10 times smaller than the actual length 34.201 < < 412.03
(the units remain unchanged). Based on the
readings shown, which sensor displays the (a) 2
correct length? (b) 3

0.0004506 (c) 4
0.04506 m 450.6 cm
km
(d) More than 4
Sensor A Sensor B Sensor C

A Peek Beyond the Point 21