Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 753 · 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.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
2. 2.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
4. 4.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
5. 5.🧩 A box has 3 rows of oranges, with 9 in each row. How many oranges are in the box? (a) 12 (b) 36 (c) 27 (d) not enough info
6. 6.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) your handwriting (d) the colour of ink
7. 7.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
8. 8.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
9. 9.🧩 Nisha bought 6 markers and a water bottle for ₹380 in all. Each marker cost the same. What did one marker cost? (a) ₹380 (b) ₹374 (c) ₹63 (d) not enough info
10. 10.🧩 A box has 3 rows of apples, with 7 in each row. How many apples are in the box? (a) 28 (b) not enough info (c) 21 (d) 10
11. 11.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
12. 12.🧩 A box of apples has 7 in each row. How many apples are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
13. 13.🧩 Ishaan bought 3 balls for ₹45 in all. Each ball cost the same. What did one ball cost? (a) ₹20 (b) not enough info (c) ₹45 (d) ₹15
14. 14.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
15. 15.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 8 PM (d) 6 PM
16. 16.🧩 Diya is 8 years old. Arjun is older than Diya. How old is Arjun? (a) 9 (b) 10 (c) not enough info (d) 13
17. 17.🧩 Vihaan is 11 years old. Meera is 8 years older than Vihaan. How old is Meera? (a) 8 (b) not enough info (c) 19 (d) 20
18. 18.🧩 Kabir bought 5 pens and a bag for ₹340 in all. Each pen cost the same. What did one pen cost? (a) ₹68 (b) ₹335 (c) ₹340 (d) not enough info
19. 19.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
20. 20.🧩 Diya bought 5 kites for ₹225 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) not enough info (c) ₹225 (d) ₹50
21. 21.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 3 PM (b) 4 PM (c) 5 PM (d) not enough info
22. 22.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) dogs hate you (d) that one dog barked
23. 23.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
24. 24.🧩 Ishaan is 12 years old. Nisha is older than Ishaan. How old is Nisha? (a) 14 (b) 13 (c) 17 (d) not enough info
25. 25.🧩 Arjun is 7 years old. Saanvi is older than Arjun. How old is Saanvi? (a) 12 (b) 8 (c) not enough info (d) 9
26. 26.🧩 Rohan bought 4 notebooks for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹40 (b) not enough info (c) ₹45 (d) ₹160
27. 27.🧩 A box has 3 rows of eggs, with 7 in each row. How many eggs are in the box? (a) 28 (b) not enough info (c) 21 (d) 10
28. 28.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 2 PM
29. 29.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
30. 30.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
31. 31.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
32. 32.🧩 Diya is 6 years old. Saanvi is 2 years older than Diya. How old is Saanvi? (a) not enough info (b) 2 (c) 8 (d) 9
33. 33.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info
34. 34.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
35. 35.🧩 Diya bought 2 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) ₹30 (b) ₹20 (c) not enough info (d) ₹15
36. 36.🧩 Kabir is 11 years old. Ananya is older than Kabir. How old is Ananya? (a) 13 (b) 16 (c) 12 (d) not enough info
37. 37.🧩 Saanvi is 7 years old. Ananya is 7 years older than Saanvi. How old is Ananya? (a) 7 (b) 14 (c) not enough info (d) 15
38. 38.🧩 Arjun is 9 years old. Kabir is 8 years older than Arjun. How old is Kabir? (a) 18 (b) 17 (c) 8 (d) not enough info
39. 39.🧩 Aarav bought 3 kites for ₹165 in all. Each kite cost the same. What did one kite cost? (a) ₹165 (b) ₹60 (c) ₹55 (d) not enough info
40. 40.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only

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