We have : (35+40+56+B):3=B
=> \(\frac{B+131}{3}=B\)
\(\Rightarrow B+131=3B\)
\(\Rightarrow131=3B-B=2B\)
\(\Rightarrow B=\frac{131}{2}=65,5\)
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Fill in the blank with the correct number
Question 1:
Complete the number pattern:
0,3,8,15,24,,48.
Question 2:
Find the area of the shaded region if A and B are squares of sides 5cm and 8cm respectively.
Answer: The area of the shaded region is .
(write your answer by decimal in simplest form)
Question 3:
If , compute =.
Question 4:
The side of each square grid is 2cm. Find the area of the shaded region.
Answer: The area of the shaded region is .
Question 5:
If , find the value of m in .
Answer: m=.
Question 6:
How many whole numbers between 1 and 100 are not divisible by 3 or 11?
Answer: numbers.
Question 7:
Evaluate:
=.
(round to four decimal places)
Question 8:
Evaluate:
=.
(write your answer by decimal in simplest form)
Question 9:
Find the whole number A knowing that A is 9 units greater than the average of A, 38, 45 and 67.
Answer: A=.
Question 10:
Find the whole number C knowing that C is 14 units smaller than the average of C, 68, 72, 99.
Answer: C=.
The average of A, B, C is 48 and A is 8 less than the sum of B and C. Find A.
(Trung bình của A, B, C là 48 và A bé hơn tổng B và C 8 đơn vị. Tìm A.)
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