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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
7.47 Solving using Formula - I

Example:
Using appropriate formula and find the value of (98)2.
Solution:
We can change the given problem like (100-2)2.
This is in the form of (a-b)2, so we can use this formula,
(100-2)2 = (100)2 - 2.100.2 + (2)2
= 10000 - 400 + 4
= 10004 - 400
= 9604


Directions: Solve the following problems using appropriate formula. Also write at least ten examples of your own.
Q 1: Using appropriate formula and find the value of (902)2.
None of these
814,604
813,604
815,604

Q 2: Using appropriate formula and find the value of (54)2.
2,916
2,816
None of these
3,216

Q 3: Using appropriate formula and find the value of (502)2.
252,008
252,004
252,006
None of these

Q 4: Using appropriate formula and find the value of (103)2.
11,609
11,706
10,609
12,609

Q 5: Using appropriate formula and find the value of (46)2.
2,916
3,216
2,116
2,816

Q 6: Using appropriate formula and find the value of (998)2.
99,604
96,004
986,004
996,004

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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