The given figure is obtained by removing some small squares from a big rectangle. The length of one side of a small square is 2 cm. Find the perimeter of the figure.
(a) 28 cm
(b) 42 cm
(c) 56 cm
(d) 160 cm
__________ is equivalent to ten lakh in International System of numeration.
A Hundred thousand
B Ten million
C One million
D Ten thousand
Which of the following is greatest?
A 4th multiple of 52
B 8th multiple of 37
C 5th multiple of 25
D 7th multiple of 50
The weight of a chocolate is 7 grams. What is the minimum number of chocolates needed to tip the scale below to the right?
A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Which of the given steps is CORRECT to find the number?
Step 1 :Let the unit’s digit be x
Step 2 :Then, ten’s digit = (9 – x)
∴ Number = 10 × (9 – x) + x
⇒ 90 – 10x + x = (90 – 9x)
Step 3 :Adding 27 to the number 90 – 9x, we get 117 – 9x
Step 4 :Number with digits interchanged is 10x + (9 – x) = 9x + 9
Step 5 :117 – 9x = 9x + 9
Step 6 :Therefore unit’s digit = 6 and ten’s digit = 3
Step 7 :Hence the number = 36.
A Only Step 4
B Both Step 1 and Step 2
C Step 1, 2, 3 and 4
D All steps are correct
how to find the solution
In a town, there are two public libraries. The number of books in one library is 2,84,683 and the number of books in another library is 3,71,805.
(i) What is the total number of books in both the libraries?
(ii) How many more books does the second library have than the first library?
C 6,56,498 87,122
D 4,65,880 87,211