Question
If a nine-digit number 389x6378y is divisible by 72,
then the value of √(6x + 7y) will be∶Solution
Divisibility law of 8 ⇒ A number divisible by 8 if its last three digits are divisible by 8. Divisibility law of 9 ⇒ A number is divisible by 9 if sum of its digit is divisible by 9. Nine-digit number 389x6378y is divisible by 72, so number also divisible by 8 and 9 also. 78y divisible by 8 if y = 4 so number become 389x63784 Nine-digit number 389x63784 divisible by 9 if sum of its digit divisible by 9. ⇒ 3 + 8 + 9 + x + 6 + 3 + 7 + 8 + 4 ⇒ 48 + x If we put x = 6, the number become 54 which is divisible by 9. So, x = 6 and y = 4 Now, √(6x + 7y) ⇒ √(6 × 6 + 7 × 4) ⇒ √(36 + 28) ⇒ √64 ⇒ 8
What is the objective of the 'Mission Himveer' launched by the Arunachal Pradesh government?
What weed-control technology does the new herbicide 'DINKAR' use?
When did TRAI issue a Consultation Paper on 'Embedded SIM for M2M Communications'?
By Harun global 500, what is the rank of India?
Which Indian animal’s genome was sequenced at the chromosome level by ICAR in 2025?
What is the capacity of the Ghatampur Thermal Power Project inaugurated in 2025?
- What is the value of the SMILE program approved by ADB to boost India’s logistics sector?
Which of the following is/are the beneficiaries under the Pradhan Mantri Awas Yojana (Gramin):
I. People belonging to SCs/STs
II. Freed ...
DCB Bank has received RBI approval to sell up to ________ stake in the bank to Tata Asset Management Private Limited (TAMPL).
Which IPL team became the most valuable franchise in 2025 after their maiden title win?
Relevant for Exams:
