दिए गए समीकरण को सही बनाने के लिए किन दो चिह्नों को आपस में बदलना चाहिए?
(72 ÷ 18) + 30 × 8 - 4 = 20

This question was previously asked in
CSIR CERI JSA Official Paper-I (Held On: 2022)
View all CSIR Junior Secretariat Assistant Papers >
  1. + और -
  2. + और ×
  3. × और ÷
  4. + और ÷

Answer (Detailed Solution Below)

Option 4 : + और ÷
Free
CSIR JSA General Awareness Mock Test
8.5 K Users
20 Questions 60 Marks 12 Mins

Detailed Solution

Download Solution PDF

BODMAS

दिया गया है : (72 ÷ 18) + 30 × 8 - 4 = 20

प्रश्न के अनुसार, संख्याओं को बदलने के बाद:

विकल्प 1) + और -

(72 ÷ 18) + 30 × 8 - 4 = 20(72 ÷ 18) - 30 × 8 + 4 = 20

(72 ÷ 18) - 30 × 8 + 4 = 20

4 - 30 × 8 + 4 = 20

4 + 4 - 240 = 20

8 - 240 = 20

⇒ -232 20 (बायाँ पक्ष दायाँ पक्ष)

विकल्प 2) + और ×

(72 ÷ 18) + 30 × 8 - 4 = 20 ⇒ (72 ÷ 18) × 30 + 8 - 4 = 20

(72 ÷ 18) × 30 + 8 - 4 = 20

4 × 30 + 8 - 4 = 20

120 + 8 - 4 = 20

128 - 4 = 20

⇒124 20 (बायाँ पक्ष ≠ दायाँ पक्ष)

विकल्प 3) × और ÷

(72 ÷ 18) + 30 × 8 - 4 = 20 ⇒ (72 × 18) + 30 ÷ 8 - 4 = 20

(72 × 18) + 30 ÷ 8 - 4 = 20

⇒ 1296 + 30 ÷ 8 - 4 = 20

1296 + 3.75 - 4 = 20

1299.75 - 4 = 20

⇒ 1295.75 20 (बायाँ पक्ष ≠ दायाँ पक्ष)

विकल्प 4) + और ÷

(72 ÷ 18) + 30 × 8 - 4 = 20 ⇒ (72 + 18) ÷ 30 × 8 - 4 = 20

(72 + 18) ÷ 30 × 8 - 4 = 20

90 ÷ 30 × 8 - 4 = 20

3 × 8 - 4 = 20

24 - 4 = 20

⇒ 20 = 20 (बायाँ पक्ष दायाँ पक्ष)

इसलिए, "विकल्प 4" सही उत्तर है।

Latest CSIR Junior Secretariat Assistant Updates

Last updated on Jun 24, 2025

-> The CSIR Junior Secretariat Assistant 2025 has been released for 9 vacancies.

-> Candidates can apply online from 17th June to 7th July 2025.  

-> The CSIR JSA salary ranges from INR 19,900 - INR 63,200 (Indian Institute of Petroleum, Dehradun & Institute of Microbial Technology) and INR 35,600 (Indian Institute of Toxicology Research).

-> The selection of candidates for this post will be based on a Written Exam, followed by a Computer Typing Test.

-> Prepare for the exam with CSIR Junior Secretariat Assistant Previous Year Papers.

More Logical Puzzle Questions

More Puzzle Questions

Get Free Access Now
Hot Links: teen patti joy official teen patti live teen patti plus teen patti rich