Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 751 · 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.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
2. 2.🧩 Ananya is 10 years old. Meera is older than Ananya. How old is Meera? (a) 11 (b) 12 (c) 15 (d) not enough info
3. 3.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
4. 4.🧩 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
5. 5.🧩 Meera bought 5 balls for ₹175 in all. Each ball cost the same. What did one ball cost? (a) ₹40 (b) ₹175 (c) ₹35 (d) not enough info
6. 6.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 5 PM (c) 6 PM (d) 7 PM
7. 7.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
8. 8.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) for fun only (c) to waste time (d) to change answers
9. 9.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
10. 10.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
11. 11.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
12. 12.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
13. 13.🧩 Diya bought 4 mangoes and a water bottle for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹80 (c) ₹76 (d) not enough info
14. 14.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (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) 6 PM (b) 8 PM (c) not enough info (d) 7 PM
16. 16.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) 9 (b) 90 (c) 18 (d) not enough info
17. 17.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
18. 18.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
19. 19.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
20. 20.🧩 A box has 4 rows of mangoes, with 7 in each row. How many mangoes are in the box? (a) 11 (b) not enough info (c) 35 (d) 28
21. 21.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
22. 22.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 7 PM
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Ananya bought 6 kites and a cap for ₹170 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹164 (c) ₹28 (d) ₹170
25. 25.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 5 PM
26. 26.🧩 A box has 6 rows of guavas, with 4 in each row. How many guavas are in the box? (a) not enough info (b) 28 (c) 24 (d) 10
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Diya bought 2 notebooks for ₹50 in all. Each notebook cost the same. What did one notebook cost? (a) ₹50 (b) ₹25 (c) not enough info (d) ₹30
29. 29.🧩 Saanvi bought 3 balls and a lunch box for ₹90 in all. Each ball cost the same. What did one ball cost? (a) ₹90 (b) not enough info (c) ₹87 (d) ₹30
30. 30.🧩 Ananya is 6 years old. Kabir is 7 years older than Ananya. How old is Kabir? (a) 7 (b) not enough info (c) 14 (d) 13
31. 31.🧩 Ananya is 9 years old. Arjun is 5 years older than Ananya. How old is Arjun? (a) not enough info (b) 14 (c) 15 (d) 5
32. 32.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) never see dogs (c) that one dog barked (d) all dogs are mean
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
34. 34.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 8 (b) not enough info (c) 4 (d) 40
35. 35.🧩 Diya is 11 years old. Tara is older than Diya. How old is Tara? (a) 13 (b) 16 (c) not enough info (d) 12
36. 36.📝 What does “evidence” mean? (a) a guess (b) a rumour (c) a loud opinion (d) facts that support it
37. 37.🧩 Ananya bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) ₹270 (c) not enough info (d) ₹45
38. 38.🧩 Arjun is 6 years old. Aarav is 3 years older than Arjun. How old is Aarav? (a) not enough info (b) 9 (c) 10 (d) 3
39. 39.🧩 Vihaan bought 6 balls and a bag for ₹140 in all. Each ball cost the same. What did one ball cost? (a) ₹140 (b) ₹134 (c) not enough info (d) ₹23
40. 40.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, mangoes match (d) yes, it is certain

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