Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 716 · 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.🧩 Aarav bought 3 mangoes and a water bottle for ₹170 in all. Each mango cost the same. What did one mango cost? (a) ₹170 (b) ₹56 (c) ₹167 (d) not enough info
2. 2.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 5 PM (d) 7 PM
3. 3.🧩 Nisha bought 2 pens and a water bottle for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹108 (b) ₹110 (c) ₹55 (d) not enough info
4. 4.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
5. 5.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
6. 6.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 5 PM
7. 7.🧩 Saanvi is 8 years old. Rohan is 4 years older than Saanvi. How old is Rohan? (a) not enough info (b) 13 (c) 12 (d) 4
8. 8.🧩 Nisha bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹60 (b) not enough info (c) ₹275 (d) ₹55
9. 9.🧩 A box of guavas has 4 in each row. How many guavas are in the box? (a) 40 (b) not enough info (c) 8 (d) 4
10. 10.🧩 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
11. 11.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
12. 12.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
13. 13.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no mango is sweet (c) yes, mangoes match (d) no, check more
14. 14.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
15. 15.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
16. 16.🧩 A box has 4 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 32 (b) not enough info (c) 40 (d) 12
17. 17.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
18. 18.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
19. 19.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
20. 20.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
21. 21.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
22. 22.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) 2 PM (c) not enough info (d) 6 PM
23. 23.🧩 Kabir is 10 years old. Nisha is 8 years older than Kabir. How old is Nisha? (a) 19 (b) 8 (c) not enough info (d) 18
24. 24.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
25. 25.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
26. 26.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 3 PM (b) 5 PM (c) not enough info (d) 6 PM
27. 27.🧩 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
28. 28.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 12 (b) 6 (c) not enough info (d) 60
29. 29.🧩 Aarav bought 4 kites and a bag for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹250 (b) ₹62 (c) not enough info (d) ₹246
30. 30.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
31. 31.🧩 Ananya bought 6 markers and a lunch box for ₹290 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹48 (c) ₹290 (d) ₹284
32. 32.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
33. 33.🧩 Arjun bought 5 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹65 (b) ₹300 (c) ₹60 (d) not enough info
34. 34.🧩 Tara bought 6 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) ₹20 (c) ₹25 (d) not enough info
35. 35.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Aarav bought 3 balls for ₹165 in all. Each ball cost the same. What did one ball cost? (a) ₹55 (b) ₹60 (c) ₹165 (d) not enough info
37. 37.🧩 Aarav is 9 years old. Arjun is older than Aarav. How old is Arjun? (a) 10 (b) 14 (c) not enough info (d) 11
38. 38.🧩 Tara bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) ₹200 (b) not enough info (c) ₹55 (d) ₹50
39. 39.🧩 Ananya bought 4 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹45 (b) not enough info (c) ₹50 (d) ₹180
40. 40.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence

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