And his son is 32 years and 7 years respectively. Find how many years ago the product of their age was 116.
(c) The product of the present age of two brothers is 160. Four years ago, elder
brother was twice as old as his younger brother. Find their present age.
5. (a) In a two digit number, the product of two digits is 20. If 9 is added to the number,
the number will be reversed. Find the number.
(b) The product of digits in a two digit number is 20. The number formed by inter
changing the digits of the number will be 9 more than the original number. Find
the original number.
(c) The product of the digits in a two digit number is 15. When 18 is subtracted from
the number, the digits interchange their place. Find the number.
6. (a) The length of a rectangular room is 5ft. longer than its breadth. If the area of the
room is 66 sq. ft., calculate the perimeter of the room.
(b) Calculate the length and breadth of a basket ball court whose area is 750 sq. ft.
and perimeter is 110 ft.
(c) The breadth of a rectangular ground is 2m. shorter than its length. If the area of
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answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

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9 x 8 divided by (5-3)=36

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.