In the following sum, ? stand for which digit? `?+1?+2?+?3+?1=21 ?` 4 (b) 6 (c) 8 (d) 9 (e) None of these

Which of the following digits will replace the H marks in the following equation? 9H + H8 + H6 = 230 3 (b) 4 (c) 5 (d) 9 (e) None of these

(1.6xx3.2)/(0.08)=?( a) 0.8(b)6.4(c)8(d)64(d) None of these

The sum of all 2-digit number divisible by 5 is (a) 945 (b) 1035 (c) 1230 (d) 1245 (e) None of these

Sum of all the 4-digit numbers which can be formed using the digits 0, 3, 6, 9 (without repetition of digits) is 119988 (b) 115992 (c) 3996 (d) None of these

Sum of all the 4-digit numbers which can be formed using the digits 0, 3, 6, 9 (without repetition of digits) is 119988 (b) 115992 (c) 3996 (d) None of these

If C_r stands for ^nC_r and sum_(r=1)^n (r.C_r)/(C_(r-1)=210 then n= (A) 19 (B) 20 (C) 21 (D) none of these

Study the following arrangement carefully and answer the questions given below: 9 4 9 2 3 2 5 9 5 8 5 8 5 4 3 1 8 1 7 4 7 6 5 2 1 2 6 1 3 2 4 6 2 Which of the following is seventh to the left of the eighteenth digit from the left end of the above arrangements? 1) 9 2 ) 5 3) 2 4) 8 5) None of these

Study the following arrangement carefully and answer the questions given below: 1 8 5 9 4 7 1 2 5 8 3 6 5 9 2 7 6 4 5 2 9 2 6 4 1 2 3 5 1 4 2 8 3 Which of the following is fifth to the right of the twelfth digit from the right end of the above arrangement? 1) 3 2) 1 3) 2 4) 7 5) None of these

3 2 5 1 7 2 8 5 9 3 5 5 4 1 6 5 3 8 5 4 3 5 1 3 2 5 6 In the above sequence in some cases, the multiplication of the two digits which immediately precede the digit '5' exceeds the multiplication of the two digits which immediately follow that digit. How many such 5's are there ? 1) 7 2) 6 3) 5 4) 4 5) None of these

Study the following arrangement carefully and answer the questions given below: 9 4 9 2 3 2 5 9 5 8 5 8 5 4 3 1 8 1 7 4 7 6 5 2 1 2 6 1 3 2 4 6 2 Which of the following is fifth to the left of the twentieth digit from the left end of the above arrangements? 1) 3 2 ) 5 3) 2 4)7 5)None of these