EXAMPLES IN WHAT IS THE ANSWER?

4.1 Guessing the answer! - 25

a) Think of a secret number between (50 - 100)
b) Ad 74
c) Cross out hundreds place value 1
d) Add that 1 to the next two digit number.
e) Subtract it from the secret number.
f) Now you have 25 (Complements of 74 with 99)

Algebric Explanation :

a) 50 + x
b) 50 + x + 74 = 124 + x
c) 24 + x
d) (24 + 1) + x = 24 + x
e) (50 + x) - (25 + x) = 25
f) 25

Try
a) __________ =
b) ___ + ____ =
c) __________ =
d) ____+ ____ =
e) ____ - ___ =
f) __________ =
Ex:
a) 52
b) 52 + 74 = 126
c) cancle 1 in 126 i.e 26
d) 26 + 1 = 27
e) 52 - 27 = 25
f) 25

4.12 Guessing the answer! - 10989

a) Think of a four digit number such that the difference between first and last digits must not be less than 2.
b) Reverse the number and find the difference of number
c) Now reverse the answer and find the sum of numbers.
d) Now you have 10989.

Algebraic Explanation :

Always 10989 is the answer.

Try
a) ________ =
b) ___ - __ =
c) ___ + __ =
d) ________ =

Ex:
a) 7234
b) 4237
7234 - 4237 = 2997.
c) 2997 + 7992 = 10989.
d) 10989

Basic operations : Additions, Subtractions.
Note: Try with different numbers always you have 10989 as the answer.

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