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Q #11
⏰ :

Directions: Read the rules listed below.

  1. Statement (a) ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient. 
  2. Statement (b) ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient. 
  3. BOTH statements (a) and (b) TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient. 
  4. Each statement ALONE is sufficient to answer the question. 
  5. Statements (a) and (b) TOGETHER are NOT sufficient to answer the question.

Zakib spends 30 % of his income on his children’s education, 20% on recreation and 10 % on healthcare. The corresponding percentages for Supriyo are 40%, 25%, and 13 %.Who spends more on children’s education?

  1. Zakib spends more on recreation than Supriyo.
  2. Supriyo spends more on healthcare than Zakib.

Discuss
+

Explanation: From statement (b), we get 0.13 S > 0.1 Z => 0.39 S > 0.3Z.Hence Supriyo spends more on children’s education.

Q #12
⏰ :

Directions: Read the rules listed below.

  1. Statement (a) ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient. 
  2. Statement (b) ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient. 
  3. BOTH statements (a) and (b) TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient. 
  4. Each statement ALONE is sufficient to answer the question. 
  5. Statements (a) and (b) TOGETHER are NOT sufficient to answer the question.

Is abcd , four digit positive number , a perfect square?

  1. The digit in tens place is an even number
  2. The digit in unit’s place is four.

Discuss
+

Explanation: Though ,it is correct that all the perfect square no.s which have four at the unit’s place ,would always have even number at the ten’s place, but the vice-versa is not true.

Q #13
⏰ :

Directions: Read the rules listed below.

  1. Statement (a) ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient. 
  2. Statement (b) ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient. 
  3. BOTH statements (a) and (b) TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient. 
  4. Each statement ALONE is sufficient to answer the question. 
  5. Statements (a) and (b) TOGETHER are NOT sufficient to answer the question.

pqrpqr is a six digit number .How many prime divisors does it have?

  1. pqr is a three  digit number which is prime.
  2. pqr is a three  digit number which is composite.

Discuss
+

Explanation: pqrpqr =pqr*1001. So if pqr is a prime no. , we can easily count the no. of divisors withot knowing the value of pqr .While this is not possible if pqr is a composite no., if we don’t know the value of pqr.

Q #14
⏰ :

Directions: Read the rules listed below.

  1. Statement (a) ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient. 
  2. Statement (b) ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient. 
  3. BOTH statements (a) and (b) TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient. 
  4. Each statement ALONE is sufficient to answer the question. 
  5. Statements (a) and (b) TOGETHER are NOT sufficient to answer the question.

If abc is a three digit perfect square with three distinct digits a, b and c. Find the values of a, b and c respectively.

  1. acb is a perfect square.
  2. Bca is a perfect square.

Discuss
+

Explanation: The only three digit no. that will satisfy the conditions are 196, 169 and 961.

Q #15
⏰ :

Directions: Read the rules listed below.

  1. Statement (a) ALONE is sufficient to answer the question, but statement 2 alone is NOT sufficient. 
  2. Statement (b) ALONE is sufficient to answer the question, but statement 1 alone is NOT sufficient. 
  3. BOTH statements (a) and (b) TOGETHER are sufficient to answer the question, but NEITHER statement ALONE is sufficient. 
  4. Each statement ALONE is sufficient to answer the question. 
  5. Statements (a) and (b) TOGETHER are NOT sufficient to answer the question.

xyz is a three digit no. You reverse  that number and subtract it from the original number. What is result of this operation?

  1. The result is divisible by 11 and is a three digit number.
  2. The result consists of the same three digits as xyz and zyx.

Discuss
+

Explanation: There is only one three digit no. that can get such a result . 954 - 459 = 495.