1.In a certain code, CONVENTIONAL is written as NOCNEVOITLAN. How is ENTHRONEMENT written in the code?
The word is divided into groups of three letters each and then the letters of each group are written in a reverse order
2.In a certain code language, COMPUTRONE is written as PMOCTUENOR. How is ADVANTAGES written in the code?
The first four letters, the middle two letters and the last four letters of the words are written in a reverse order to form the code.
3. In a certain code, VISHWANATHAN is written as NAAWTHHSANIV. How is KARUNAKARANA written in that code?
4.In a certain code, MONKEY is written as XDJMNL. How is TIGER written in that code?
The letters of the word are written in a reverse order and then each letter is moved one step backward to obtain in code.
5.In a certain code, PLEADING is written as FMHCQMFB. How is SHQULDER written in that code?
The last four letters of the word are written in the reverse order, followed by the first four letters in the same order. In the group of letters so obtained, each of the first four letters is moved one step backward while each of the last four letters is moved one step forward to get the code. Thus, we have: SHOULDER → SHOU/LDER → REDL/SHOU → QDCK/TIPV
6. What is the product of all the numbers in the dial of a telephone?
D.None of these
Since one of the numbers on the dial of a telephone is zero, so the product of all the numbers on it is 0.
7. At the end of a business conference the ten people present all shake hands with each other once. How many handshakes will there be altogether?
Clearly, total number of handshakes =[n(n-1)]/2 = 45.
8. The number of boys in a class is three times the number of girls. Which one of the following numbers cannot represent the total number of children in the class?
Let number of girls = x and number of boys = 3x. Then 3x + x = 4x = total number of students. Thus, to find exact value of x, the total number of students must be divisible by 4.
9. If you write down all the numbers from 1 to 100, then how many times do you write 3?
Clearly, from 1 to 100, there are ten numbers with 3 as the unit’s digit – 3, 13, 23, 33, 43, 53, 63, 73, 83, 93; and ten numbers with 3 as the ten’s digit – 30, 31, 32, 33, 34, 35, 36, 37, 38, 39. So, required number = 10 + 10 = 20.
10. In a family, each daughter has the same number of brothers as she has sisters and each son has twice as many sisters as he has brothers. How many sons are there in the family?
Let d and s represent the number of daughters and sons respectively. Then, we have: d – 1 = s and 2 (s – 1) = d Solving these two equations, we get : d= 4, s = 3.