Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 640 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Rohan bought 3 notebooks for ₹180 in all. Each notebook cost the same. What did one notebook cost? (a) ₹65 (b) not enough info (c) ₹180 (d) ₹60
2. 2.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
3. 3.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
4. 4.🧩 Saanvi is 9 years old. Aarav is 8 years older than Saanvi. How old is Aarav? (a) 17 (b) 8 (c) not enough info (d) 18
5. 5.🧩 Vihaan is 8 years old. Meera is 5 years older than Vihaan. How old is Meera? (a) 5 (b) not enough info (c) 14 (d) 13
6. 6.🧩 Aarav is 12 years old. Kabir is older than Aarav. How old is Kabir? (a) 17 (b) 14 (c) not enough info (d) 13
7. 7.🧩 Ishaan is 10 years old. Kabir is 9 years older than Ishaan. How old is Kabir? (a) 9 (b) 19 (c) not enough info (d) 20
8. 8.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
9. 9.🧩 A box has 3 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 36 (b) 27 (c) 12 (d) not enough info
10. 10.🧩 A box of guavas has 6 in each row. How many guavas are in the box? (a) 60 (b) 12 (c) not enough info (d) 6
11. 11.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
12. 12.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) a rumour (d) facts that support it
13. 13.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
14. 14.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Vihaan is 9 years old. Tara is 3 years older than Vihaan. How old is Tara? (a) 13 (b) 12 (c) 3 (d) not enough info
17. 17.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
18. 18.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) 7 (c) 70 (d) not enough info
19. 19.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 7 PM (d) 8 PM
20. 20.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
21. 21.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) 4 PM (c) not enough info (d) 5 PM
22. 22.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 8 PM (c) 7 PM (d) not enough info
23. 23.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
24. 24.🧩 Diya bought 5 pens for ₹125 in all. Each pen cost the same. What did one pen cost? (a) ₹30 (b) not enough info (c) ₹125 (d) ₹25
25. 25.🧩 Meera bought 4 notebooks and a bag for ₹240 in all. Each notebook cost the same. What did one notebook cost? (a) ₹236 (b) ₹240 (c) ₹60 (d) not enough info
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
27. 27.🧩 Before solving a word problem, first check… (a) the colour of ink (b) what facts are given (c) your handwriting (d) the page number
28. 28.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) not enough info (b) 24 (c) 28 (d) 10
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
30. 30.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Nisha bought 2 pens for ₹100 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) not enough info (c) ₹50 (d) ₹100
32. 32.🧩 Meera bought 6 balls and a cap for ₹310 in all. Each ball cost the same. What did one ball cost? (a) ₹304 (b) ₹310 (c) not enough info (d) ₹51
33. 33.🧩 Saanvi is 12 years old. Ishaan is 2 years older than Saanvi. How old is Ishaan? (a) 15 (b) 2 (c) 14 (d) not enough info
34. 34.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
35. 35.🧩 A box has 4 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 25 (b) not enough info (c) 20 (d) 9
36. 36.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 45 (b) not enough info (c) 13 (d) 40
37. 37.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 9 PM (b) 8 PM (c) not enough info (d) 5 PM
38. 38.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
39. 39.🧩 Kabir is 7 years old. Tara is 9 years older than Kabir. How old is Tara? (a) 9 (b) 16 (c) not enough info (d) 17
40. 40.🧩 Ishaan bought 2 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹50 (c) ₹30 (d) ₹25

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